本文選題：大規(guī)模MIMO + ZF　； 參考：《杭州電子科技大學(xué)》2017年碩士論文

【摘要】：無線通信技術(shù)已步入一個(gè)快速發(fā)展的階段,人們對無線傳輸速率和質(zhì)量的要求越來越高。大規(guī)模MIMO傳輸技術(shù)以其較高的頻譜效率和功率效率成為下一代無線通信系統(tǒng)的關(guān)鍵技術(shù)之一。大規(guī)模MIMO技術(shù)通過在通信系統(tǒng)的發(fā)送端或/和接收端設(shè)置多根天線,允許多個(gè)天線同時(shí)發(fā)送或接收多個(gè)空間數(shù)據(jù)流,成為一種可用于提高性能或容量的資源,實(shí)現(xiàn)多個(gè)空間數(shù)據(jù)鏈路共享時(shí)間和頻段的傳輸技術(shù)。由于大規(guī)模多輸入多輸出(MIMO)系統(tǒng)能夠極大地增加系統(tǒng)容量和提高無線鏈路的質(zhì)量方面的優(yōu)點(diǎn),其受到越來越多的關(guān)注。在以往的大規(guī)模MIMO系統(tǒng)研究中,往往是針對單天線用戶的大規(guī)模MIMO系統(tǒng)進(jìn)行研究。另一方面,隨著技術(shù)的不斷發(fā)展,在用戶端裝有多根天線也成為可能。本文對用戶具有兩根天線的大規(guī)模MIMO系統(tǒng)進(jìn)行了分析研究。針對多小區(qū)的大規(guī)模MIMO上行系統(tǒng),每個(gè)小區(qū)裝備有M根天線的基站和同頻同時(shí)段服務(wù)于K個(gè)用戶。在假設(shè)每個(gè)用戶端裝備有兩根天線的前提下,首先為了極大化線性解碼的好處如ZF、MMSE解碼,一個(gè)空時(shí)碼的設(shè)計(jì)準(zhǔn)則被給出;其次,本論文推導(dǎo)出系統(tǒng)在分別采用ZF、MMSE解碼方法和所設(shè)計(jì)空時(shí)碼的條件下用戶可達(dá)上行速率的下限。并和已有單天線用戶的大規(guī)模MIMO系統(tǒng)可達(dá)上行速率進(jìn)行仿真比較,仿真結(jié)果表明雙天線用戶的大規(guī)模MIMO系統(tǒng)在同等條件下其可達(dá)上行速率幾乎優(yōu)于單天線用戶的大規(guī)模MIMO系統(tǒng)的兩倍。最后,在接收功率受限情況下,推導(dǎo)出當(dāng)基站天線數(shù)M??時(shí),用戶可達(dá)上行速率的近似值。最后,對于單小區(qū)上行系統(tǒng),本論文還推導(dǎo)了其在分別使用ZF和MMSE解碼方法下的成對錯(cuò)誤概率(PEP)公式,得出其成對錯(cuò)誤概率的上下界以及近似估計(jì)的解析式。仿真結(jié)果驗(yàn)證了所推導(dǎo)出結(jié)論的正確性。最后在同樣比特傳輸速率情況下,對單天線用戶系統(tǒng)和雙天線用戶系統(tǒng)的誤比特率做仿真比較,仿真結(jié)果表明雙天線用戶的誤比特率要遠(yuǎn)遠(yuǎn)低于單天線用戶的誤比特率。
[Abstract]:Wireless communication technology has entered a stage of rapid development, people demand more and more high wireless transmission rate and quality. Large-scale MIMO transmission technology has become one of the key technologies in the next generation wireless communication system because of its high spectral efficiency and power efficiency. Large-scale MIMO technology allows multiple antennas to transmit or receive multiple spatial data streams simultaneously by setting multiple antennas at the transmitter or / and receiver of the communication system, becoming a resource that can be used to improve performance or capacity. The transmission technology of sharing time and frequency band for multiple spatial data links is realized. Because large scale MIMO systems can greatly increase system capacity and improve the quality of wireless links, more and more attention has been paid to it. In the past large scale MIMO system research, usually is the large-scale MIMO system which the single antenna user carries on the research. On the other hand, with the development of technology, it is possible to install multiple antennas at the user end. In this paper, a large scale MIMO system with two antennas is analyzed and studied. For a large scale MIMO uplink system with multi-cell, each cell is equipped with M-antenna base station and serves K users at the same time. Assuming that each client is equipped with two antennas, a design criterion of space-time codes is given for maximizing the benefits of linear decoding, such as ZFU MMSE decoding. In this paper, the lower limit of the uplink rate is derived under the condition that the system adopts the ZFU MMSE decoding method and the designed space-time code, respectively. And compared with the large scale MIMO system with single antenna, the uplink rate of the system is simulated and compared. The simulation results show that the uplink rate of the large scale MIMO system with dual antenna users is almost twice that of the large scale MIMO system with single antenna users under the same conditions. Finally, when the received power is limited, the number of antennas in the base station is deduced. The user reaches an approximation of the uplink rate. Finally, for a single cell uplink system, the pairwise error probability formula is derived by using ZF and MMSE decoding methods, and the upper and lower bounds of the pair error probability and the analytical formula of approximate estimation are obtained. The simulation results verify the correctness of the deduced conclusions. Finally, under the same bit transmission rate, the bit error rate of single antenna user system and dual antenna user system is simulated and compared. The simulation results show that the bit error rate of dual antenna user is much lower than that of single antenna user.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN919.3

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本文編號：1799912